Calculating-machine.



G. J. BARRETT.

CALCULATING MACHINE.

APPLICATION FILED JUNE 24 1911 Save "to:

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Patented Apr. 1 1912.

3 SHEETSBHEET 2.

n Q N G. J. BARRETT. CALCULATING MACHINE.

APPLICATION FILED JUNE 24, 1911.

3 SHEETS-SHEET 3.

Patented Apr. 16; 1912.

ma? .%MM um N QM! UNITED STATES PATENT OFFICE.

GLENN J. BARRETT, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR TO BARRETT ADDINGMACHINE COMPANY, OF GRAND RAPIDS, MICHIGAN.

CALCULATING-MACHINE.

Specification of Letters Patent.

Patented Apr. 16, 1912;

Application filed June 24, 1911. Serial No. 635,061.

, To all whom it may concern:

Be it known that I, GLENNJ. BAIiRET'l, a citizen of the lTnited States,residing at Grand Rapids, Michigan, have invented certain new and usefulImprovements in Calculilting-Machines, of which the following is aspecification.

This invention relates to im1i)ro\-*ements in calculating machines ofthe key set type, and is especially adapted to the machine illustratedand described in my United States Patent No. 976,336, of November 22,1910.

The prime object of my invention is to provide a practical locking andunlocking means between the reciprocating digit set ting mechanism andthe accumulating dials, which means will be external to any of thereciprocating members, and independent thereof.

Further objects and objects relating to details of operation andeconomies of con struction will appear from the detailed description tofollow.

I accomplish the objects of my invention by the devices and meansdescribed in the following specification.

The invention is clearly defined and point ed out in the claims.

A structure which is sufiiciently illustrative of a preferredembodimentof my in-- vention is shown in the accompanying drawings,forming a partof this specification, in which:

Figure I is a longitudinal sectional side elevation view of the digitsetting and accumulating portion of a calculating machine to which myinvention is applied. Fig. II is an enlarged detail sectional elevationview taken from the right of the particular portion of said calculatingmachine to which my invention is applied, taken on a line correspondingto line 2-2 of Fig. IV. Fig. III is an enlarged detail sectionalelevation view of a portion of the parts shown in Fig, II, takenon aline corresponding to line 3-3 of Fig. IV. Fig. IV is a front sectionalelevation view taken on a line corresponding to line 4--4 of Figs. IIand III. Fig. V is a rear sectional elevation view taken on a linecorresponding to line 55 of Fig. II. Fi VI is a detail view of the swinglocking arm which carries the locking pinion 15. Fig. VII is a sectionalplan view of a. p0rtion of the digit setting mechanism of thecalculating machine, showing the point where the restoring or pick-upparts abut said digit setting members, and where locking pinion lockingrack 22 is pivoted to said digit mechanism, taken on a line correspond.ing to line 7-7 'of Fig. I. Fig. VIII is a detail perspective view ofthe keystem trip plate or bar 202. Fig. IX is an elevation view of theleft side of a calculating machine to which my invention is applied,showing a form of control for actuating the parts to which my inventionparticularly relates.

In the drawing similar numerals of referonce refer to similar partsthroughout the several views and the sectional views are taken lookingin the direction of the little arrows at the ends of the section lines.

I have shown my invention in connection with such a calculating machineas that covered by my said Patent No. 976,336. In machines of thisclass, keystcins are de pressed and latched down, interposing stopmembers in the path of travel of cooperating stop members on thereciprocating digit setting slides or parts, thus limiting the forwardmovement of said reciprocating parts.

A bail rod adapted to swing back and forth stems, and then to re'engagethe same before said digit setting arts return to normal position,during which return the cooperating dials record the digit to beaccumulated. This engaging and disengaging is sometimes accomplished bymoving the dial gear in and out of mesh with the reciprocating digitmembers, or as in my said patent, by means of a locking dog or some partcarried by some member of the reciprocating digit parts. I have hererovided improved cooperating means and mechanism for such pur ose.

1 T at my structure here may be very n readily understood, I havenumbered the {part has been released, the slide 213 is same withnumerals of reference exactly in accordance with the numerals ofreference of my said prior patent, so far as the parts correspond.

The framework 2 is incased by the casing 1, The keystems 200 suitablyformed extend downward through suitable guiding slots in the casing, anda keystem trip plate or bar 202 (see Fig. VIII) is provided, havingdownwardly extending lugs, to cooperate with the supporting bar 19beneath. This plate or bar 202 is common bar for each column ofnumerals. which is actuated by j any one of the keystems of anyparticular column. Latch means are provided for holding the keystems inthe depressed position, and the keystem trip plate or bar 202 is forreleasingthe same. I

Und r the guide plates for the keystems are the digit slides, one foreach row or column of lceystems, and adapted to cooperate with saidkeystems. The stopping portion of-these slides is made up of two sideportions 20% and 204 .uitably secured together, A slot 20% is in therear portion of these stop pieces through which pass the supporting andguiding rods 101.- A guiding frame supports said slides in the rear andtheir guiding rod 101, as shown. Upon the left side of thisreciprocating digit slide is rigidly attached a toothed rack bar 205 bymeans of the bolts 206, in such a manner as to leave a narrow guidingspace between the said bars 204; and 205 (see Fig. VII). The forwardportion of the rack bar 205 is supported and guided by the guide pulleys3e (see Fig. II) at the front of the machine, which pulleys are carriedby the cross bar 31. A little bracket 3%, secured to said bar 31, isprovided for each grooved, guiding pulley A bail rod extends between thearms 350 on each side of the machine (see Figs. I and IX) and impart toit a swinging motion from the rear toward the front and return. as themachine is operated by the actuation of the shaft 357. Freely mounted onthis hail rod are the push bars 208. Slidably mounted upon each of saidpush bars 208 are the slide pieces 213 which are supported on the studs212i and 21 5,- upon the said push bar 208, arranged in the slottedholes in said pieces 213. A carrying spring 501 extends between the stud215 on bar 208 and said slide 213, exerting a tenion upon slide 213toward the rear of the machine.

A compensating spring 500 extends between the digit slide frame side204:, being connected at 213, and slide 213, as will he seen. As pushbar 208 of anyslide. advances by reason of the swinging bail 325, whichis actuated from the actuating shaft 257, as will be later shown, if themovable forced away from its normal position. The bail always has thesame movement every time the operating shaft 257 is actuated. If anumber 1 keystem has been depressed, the digit slide moves forward adistance sufficient to rotate the dials one space. When the bail 325 isreturned, it through the push bar forces said slide back to normalposition. The number 1" keystem cooperating with the forward ear of thedigit slide prevents any further movement of said slide, and. thus thecorrect amount s registered. Further movement of the had 325 aftercontact with the number 1 stopping ear on 201 on the number .1 keystemcauses the slide 213 to leave the normal position.

It will be noted that the springs 500 are extended only after the slidesreach their respective limits, as described in my said former patent.

The purpose of the slotted connection between slides 213 supported onstuds 21 1 and 215 and push bar 208 is for the purpose of storing powerfor the carrying operation. as described in my said former patent. Thetransfer mechanism in this present structure is the same as thatappearing in my said former patent, and will not need to be de-.

scribed here in detail.

A swinging locking arm 1% correspond ing to the locking arm 337 in theformer patent. is here provided. This locking arm 145 carries a pinionfor coupling an actuating segment to the dial gear. The operating shaft357 is connected so that during its movement the digitsettingreciprocating members are drawn forward and returned.

By referring to Fig. IX it will be noted that a little in advance of theactuating shaft 357 is pivotally mounted the arm 36S carrying the pins369. At the lower extremity of this swinging arm is the roller 361adapted to coiiperate with the cam lever 364:. An arm 372 is mounted onshaft 357. Pivotally mounted upon a forward projection from the arm 372at pivot 339 is the tongued pawl 387 held in a central normal positionby the spring 521. As the arm 372 advances toward the front ofthemachine, this pawl 387 cont-acts with pin 369 at the uppenextremity' ofthe arm 368, which in turn forces the roller 361 haelrwardly, allowingthe forward end of the lever 364 to drop suddenly. As this pawl 387advances toward the limit of its forward motion, the under side of thesame engages the lower pin 369, so that the early portion of the returnmovement of the arm 3T2 again forces the roller 361 back to positionshown in Fig. IX. The arm or lever 364 is loosely mounted upon the shaft326 and is held in position by the screw 303. v

. The locking arms 14. as stated, are pivoted on rock shaft 320 A crossrod 328 contro s the movement thereof. There is one of those lookingarms for each dial section arranged in relative position shown in Figs.II, III, IV and V. Attached to the stop arm 121 is a segment 24, theteeth of which alinewith those of the sector 107, and the three parts,segment 24, arm 121 and sector 10?, move in synchrony on the shaft 128.Thus it will be seen that the segment 24 swings in proximity to the gear102.

Upon the locking arm 14 the locking pinion 15 is suitably journaled at18. The teeth of the pinion 15 are broad enough to mesh with both thesegment 24 and the gear 102, as shown in Figs. IV and V. It will be veryreadily understood that when pinion 15 is in mesh with segment 24 andgearl02, it forms a lock between the sector 107 with cooperating partsand gar 102, and that when so locked any movementof the racks and digitsetting slide will produce like movement of the gear 102 and hence ofthe dial 100 which is eered thereto.

It will be understood from the description herein and by reference to mysaid patent that when operating means common to such machines and hereindescribed start, the locking arm lat is allowed to drop, drawing thelocking pinion 15 out of locking mesh with when operating mechanismstarts to return, locking pinion 15 is again thrown into mesh with gear102 and segment 24, and by reason of proper timing of parts, this isaccomplished before the digit setting slide starts toward normalposition. Fig. IV shows a structure for swinging the loclring arm 14,.and has already been sufficiently described. To understand the newfeatures which I have here produced, I will say that the pinion 15 andits related parts are the essential thing.

22 is a locating rack always in mesh with the pinion 15, being held insuch mesh by the pin 19 and of course adapted to swing with pinion 15and arm 14. The other end of saidrack 22 is attached to the digitsetting slide at 29. The object of this rack to force an alinementof theteeth of pinion '15 with segment 24. If this is not done, it might hepossible for the points of the gear teeth of pinion 15 and segment 24and gear 102 to come together and not 1h. thercbv locking up the machineand piwcnting ILS operation.

From what I have said it is clear that many modifications of myimprovedcalculating machine are possible without departing from my invention.The invention is adapted to various styles of calculating machines.Various devices and mechanisms nu v be provided for throwing myiInproved locking pinion into and out of mesh. I have shown a preferredform of such gear 102 and segment 24, and that means. I desire to claimthe device broadly and also specifically, as indicated by the appendedclaims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is: I

1. In a calculating machine, the combination of reciprocating digitsetting menu bers carrying racks, keystenis to limit the movement ofsaid reciprocating members in one direction, sectors meshing with saidracks, gear segments carried by said sectors, dial gears mounted axiallywith said sectors and in proximity to said segments, swinging lockingpinions adapted to mesh simultaneously with both said segments and saiddial gears and lock the same against relative movement, means for movingsaid locking pinions in and out of mesh with said gears and segments,and locating racks always in mesh with said locking pinions andconnected to said reciprocating digit members, substantially asdescribed.

2. In a calculating machine, the combination of reciprocating membershaving teeth, dial gears corresponding to said reciprocat ing members,locking pinions adapted to. mesh simultaneously with said reciprocatingmembers and said dial gearsfmeans for throwing said locking pinions intoand out of mesh with said reciprocating member and said. dial gears, andmeans for alining the teeth of said locking pinions with the teeth ofsaid reciprocating members, sub stantially as described.

In a calculating machine, the combination of reciprocating membershaving teeth, accumulating dials, diai actuating members having teeth,locking pinions adapted to mesh simultaneously with said reciprocatingand said dialactuating memhers, means for throwing said locking pinionsinto and out ofmesh with said recip rocating and said dial actuatingmeinhers, and means for alining the teeth of said locking pinions withthe teeth of said reciprocating members, substantially as de scribed.

4. In a calculating machine, the combination of reciprocating members,dial actuating members and means for locking and unlocking saidreciprocating members and said dial actuating members, consistingof'loclr ing pinions mounted on swinging and adapted to swingindependently of the movement of said reciprocating members.

5. In a calculating machine, the combination of reciprocating members,dial actuating members, means for locking and un: locking saidreciprocating members and said dial actuating members consisting 0flocking pinions mounted on swinging. arms and v \o adapted to swingindependently of the movement of said reciprocating members,

and a locating rack meshing with said pinion and pivotully connected tosaid reciprocatinn members.

ently of said reciprocating members. 10 1 7. In a calculating machine ofthe key set type, the combination of key-stems,n1eans of latching thesame in depressed position, reciprocating members cooperating with saidkeystems, dial actuating members, means for locking and unlocking thesame and 5 means for carrying said locking and u'nloekmg meansindependent of said reciprocating members.

In witness whereof, I have hereunto set 1 my hand and seal 1n thepresence of two 29 witnesses.

GLENN J, BARR TT, [11.5.] v Witnesses IIELEN M. NEWTON, MABEL F.HOLLWAY.

Copies of this natent anag be obtained for five cents each, byaddressing the Commissioner of Patents,

' Washington, D. C.

